int sumadigitos(int num)
{
    int sdigitos = 0;
    while(num != 0)
    {
        sdigitos = sdigitos + (num % 10);
        num = num / 10;
    }
    return sdigitos;
}

int cuantosdigitos(int num)
{
    int count;
    while(num != 0)
    {
        count++;
        num = num /10;
    }
}

int RaizDigital(int num)
{
    while((sumadigitos(num) / 10) > 0)
    {
        num = sumadigitos(sumadigitos(num));
    }
    return sumadigitos(num);
}